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* [mubios] Implement serial input and BIOS console key handlingRichard Qin17 hours1-0/+3
| | | | | | Implement UART receive, transmit timeouts, configuration and status reporting for INT 14h functions 00h-03h. Initialize the BDA serial timeout and expose the driver interfaces. Translate terminal characters and CSI/SS3 escape sequences into BIOS keyboard events for INT 16h. Add blocking reads, non-consuming status queries, enhanced key reads and keyboard buffer insertion.
* [mubios] Initialize the 8042 keyboard controllerRichard Qin19 hours1-0/+1
| | | | | | | | | | | | | | | POST only unmasked IRQ1 in the PIC and never configured the 8042 itself, so the keyboard stayed in its post-reset disabled state: the clock was inhibited and no scan code ever reached the output buffer. IRQ1 never fired, the BDA keyboard buffer stayed empty, and GRUB polling INT 16h AH=01h never saw a key. Add kbd_init() to disable both ports, drain the output buffer, clear the clock inhibit bits in the command byte, enable the keyboard and auxiliary IRQs and select set 1 translation, then enable scanning with 0xF4. The IRQ1 handler now checks the status register for a pending output byte before reading the data port and drops auxiliary port bytes. The set 2 break prefix tracking is gone because translation is enabled.
* [mubios] Initialize VGA mode and serial BIOS servicesRichard Qin39 hours3-1/+14
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* [mubios] Handle IRQ7 and mask unused IOAPIC inputsRichard Qin42 hours1-0/+2
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* [mubios] Fixed BDA Offset and IRQ1 Save OrderRichard Qin2 days1-2/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 16h Keyboard ServiceRichard Qin2 days2-0/+9
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 15h E820hRichard Qin2 days2-0/+6
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Extend registers from 16-bit to 32-bitRichard Qin2 days1-1/+1
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Multi-sector INT 13h AH=42hRichard Qin2 days1-1/+1
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Add Interrupt Dispatch ServiceRichard Qin2 days1-0/+43
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement INT 13h AH=41hRichard Qin2 days1-0/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement a minimal INT 10h AH=0EhRichard Qin2 days1-0/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Add ATARichard Qin2 days1-1/+10
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] fixed memory addressRichard Qin2 days1-1/+1
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Have IRQ0 maintain the BIOS clock, and implement INT 1Ah AH=00h.Richard Qin3 days1-0/+3
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Enable IRQ0Richard Qin3 days1-1/+2
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Create 16-bit entry points for IRQ0/IRQ1 and install the IVT vectors.Richard Qin3 days2-1/+35
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement the PIC and PIT.Richard Qin3 days1-1/+4
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Implement the COM1 serial port driver and POST output.Richard Qin3 days1-0/+5
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Initialize IVT, BDA and EBDA.Richard Qin3 days3-1/+99
| | | | Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
* [mubios] Building a 32-bit C entry in protected modeRichard Qin3 days1-0/+26
Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
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